Permutation lock



J. B. HELLER.

PERMUTATION LOCK.

APPLlcATloN FILED FEB. 2a, 1920.

Patented Aug. 29, 1922.A

2 SHEETS-SHEET l.

WEE.. m

INVENToR.

J. B. HELLER.

PERMUTATION LOCK. APPLICATIQN FILED FEB. 28;'1920.

Patented. Aug. 29, 1922.

zsH'EETsfsHser 2.

INVENTOR.

crrsn rarer fries,

Linssn B'. SELLER, or LAKEWOOD, orare, .Assrenon To nanowar, :Moron coNmnon co., A CORPORATION or nELawAnE,

rnnivrn'rnrioiv Loon.

Specification of Letters Patent. Patented Aug., 29, 1922,.

Application iled February 28, 1,920, Seriallo. 362,167.

- invention,

Figure 2 is a side elevation "with the cover and shells in section, y ltiigure 3 is a sectional view on theline lll-e111 of Fig. 4,

Figure 4 is a sectional view on the line I`VIV of Fig. 3,

Figure 5 is a sectional plan view on the line V-V of Fig. 2, with the parts in their fully locked position,

Figure 6 is a view similar to Fig.l 5,`from which someof the parts have been omitted for clearness, and in which the lock parts have been shifted one point, f

Figure 7 is another view similar to Fig. 5, in which the lock parts have been shifted four points, to unlock the switch operating shaft, l

`Figure 8 is still another view .similar to Fig. 5, in which the switch shaft has been shifted,

Figure 9 is a sectional view on the line lX-X of Fig. 4i, with the parts in the position shown in Figs. 15,

Figure 10 is a sectional view on the line X-X of Fig. 2, with the parts kin the position shown in Fig. 8,

Figure 11 is a detail sectional view on the line XI-XI of Fig. 1,

Figure 12 is a perspective view of one of the actuating push buttons.

vThis invention relates to an improvement in permutation locks, and more specifically to locks for electric switches. l'

The .lockparts shown are generally similar to those shown in my co-pending application, Serial No. 301,319, filed June 2, 1919, the patent to O. P, Barnes, No. 1,316,934-, of September 23, 1919, and the application of R. R. Barnes, Serial No. 361,928, filed Feb. 28, 1920. l

The object of my inventionis to provide a simple and eiiicient locking device in connection with permutation locks which will permit the permutation mechanism to be vbe best understood by reference to the accommoved a predetermined distance before the iock is released, together with a vlock so arranged that when the loch is moved from its unlocked to its locked position, it will move the permutation mechanism to Zero, or what is generally termed its fullyloclred position.

In this case have shown the lock in connection with a .well knownv snap switch, and which'isthrown from oneeXtreme to the other by a spring actuated toggle, the parts being so arranged to hold theswitch in its extreme positions by the action ofthe spring. lThe toggle is actuated by an oscillating shaft which is locked against movement when ythe switch is open, and which lock is released by the permutation mechanism, when said mechanism lhasbeen moved a predetermined ydistance to permit the switch to be closed. f y

They lock parts are arranged to shift the ,permutation mechanism tozero or their fully locked position when the switch is opened, andfat the saine time lock the switch against movement toits closed position.

kThe precise nature of my invention will panying drawings, which willy now be desc11'ibe'd,-it being premised, however, that various changes may be made in the details of construction and arrangement ofthe parts, without departing from the spirit and scope of my invention, as defined in the appended claims.

f Referring to the accompanying drawings,

the reference character 1() designates a base having an upwardly extendingv hollow spindle 11. 12 is a combination wheel or lock releasing member mounted on the spindle 11, and which. fis arranged to be moved fourpoints in one direction by cams 13 on push buttons 151., through the medium of four pins 15 in the combination wheel 12.

These pins 15 are placed in a predeter- -mined position on the combination wheel 12 to advance-the combination wheel four points step-by-step, from zero to its unlocking position when kthe buttons 14, (which I have ldesignated 1-8) are operated in a prearranged order.-

The combination wheel 12 is held inits different positions by a spring pawl 16 which engages recesses in the combination wheel 12. Mounted to oscillate on the combination wheel 12 between the upper face thereof and a vflanged collar 17 secured to the combination wheel by screws 18, is a trip wheel 19, for `returning the combination wheel stepby-step to zero through the medium of triction clutch members 19, when the buttons 14, are actuated out ot order.

The trip wheel 19 is oscillated by radial projections 2O on the buttonsk14, which enter helical grooves in the trip wheel, there being eight suon grooves shown, one for each projection 20 on the eight buttons 14. ln order to hold the trip wheel 19 in a fixed position with relation to the buttons 14, I provide a spring actuated lever 21 which oscillates on the hollow spindle 11.

22 is a spring connected to the lever 21 and a spring holder 23 secured as hereinafter described. i

' The buttons 14 are normally held in their elevated positions by means of springs-241L which are seated in recesses in the push buttons 14 and which engage the base 10.

The ybuttons 14 are adapted to reciprocate in guides in a shell 24, which is secured to a shell 25 by screws 26, the base 10 being clamped in position between the shells.

The spring holder is clamped in position on one ot the lugs for the securing screws 26 `on the shell 24v by the screw passing through said lug.

27 is a cover tor the shell 24 which is locked in position by a spring bolt 28, see Figure 11.

Mounted within the shell 25 is a snap switch having a switch blade 29 which is arranged to close the circuit affross spring contacts 30 and 31 secured to block or base oi insulating material secured to the bottom o1 the shell 25. i

The switch blade 29 is connected toa toggle lever 33 pivoted on a trame 34 connected to the loch 32, and which toggle lever 33 is actuated by a compression spring on a connecting rod connected to a crank 36. The crank 36 is pivoted in the 'frame `234 and is connected to a shaft 37 mounted in the hollow spindle 11, and which shatt extends trom the shell 25 to the outsidel oitl the cover Secured to the squared upper end oit the shailt 37 by means oi' a screw is a turn button 38 tor actuating the switch.

The lower end ot the shaft 37 is also squared, and connected thereto by a screw, is a lever 39 which extends into the shell 24 through an opening through a hollow boss on the lower end oi' the hollow spindle 11. The lower end of the hub ot lever 39 is slotted to receive a flat portion on the crank 36,

there being insulating materialbetween the crank and the hub of lever 39, to prevent grounding of the circuit controlled by the j switch.

Pivotallymconnected to the outer end of Ylever 39 is-a latch or lock lever 40, which is 'normally held' in its working position by a ure 10.

leat spring connected to the latch lever, and which bears against the hollow boss on the lower end ot spindle 11. A

@ne end ot the latch ylever 40 is recessed to engage a projection 41 on the base 10, t-o loclr the switch in its open position, while the other end of the latch lever is arranged to be engaged by a cam 42 on the combination wheel 12 to tree the latch lever from the projection 41 when the combination wheel has been advancedtour points from zero; T he last mentioned end ot latch lever 4() also arranged to engage a tooth 43 on the combination wheel 12 to return the permutation mechanism to Zero when the switch is opened.

The permutation mechanism in Figures 1 to is at Zero, and the switch in said figures as well as Figure 9 is in its open position. When it is desired to close the switchv the permutation mechanism must be moved 'tour steps to bring the mechanism trom the position shown in Figure 5 to that shown in .Figure 7, which is accomplished in this lock by pushing buttons 7 5, 3-4 in sequence. lllhen buttons 7, 5, i5 are pushed the permutation mechanism will be shifted from the position shown in Figure 5 to that shown in Figure 6, and when button 4 is pushed, the permutation mechanism will be shifted to the position shown in Figure 7. The action oi" cam 42 on the latch lever 40' will release the latch lever from projection 41 and permit the shattv37 to be rotated by means ot the tiufn-button approximately 90o, from the position shown in Figures 5, 6 and 7 to that shown in Figure S. This shifting ot the shaft will throw the switch from the position shown in Figure 9to that shown in F ig- Vvlhen the switch is tl'n'ownin the reverse direction to open the circuit, the shaft 37 is rotated clockwise 'from the position shown in Figure 8 to that shown in Figures 5, 6 and 7, and during the clockwise movement oit this sha'tt the end. ot the latch lever 40 will engage the tooth 43, and shiit the permutation mechanism to yZero. tust before the permutation mechanism is shifted to zero, the end ot the latch lever 40 will engage the projection 41, which will release the front end ot kthe latch lever from the tooth 43, and permit the latch lever to pass beyond said tooth asuilicient distance to permit the notched end ot the latch lever to engage the projection 41 to loclr the switch against movement, as clearly shown in Fig- 'ure 5 l lt the 7 and 5 buttons are pushedfin sequence, and any ot theother buttons with the exception ot button l are then pushed, the permutation mechanism will be returned to Zero by the trip wheel 19, through the medium of the spring-pressed friction clutch members 19:l which is arranged yto actuate the combination wheels 12 counter clockwise, but will permit the trip wheel i9 to move freely in a clockwise direction.

The advantages of my invention result from the provision of the lock for a switch actuating shaft or similar member, which is arranged to be released by permutation mechanism when the permutation mechanism is moved a predetermined distance, and which permutation mechanism is adapte-d to be oscillated within a pre-arranged limit without affecting the locking mechanism. Another advantage of my invention results from the provision of locking mechanism whichr is arranged to return the premutation mechanism to zero when the locking mechanism is shifted from its unlocked position to its locked position.

1. A permutation lock, comprising a spindle, a combination wheel on the spindle, a return wheel, means :tor moving the combination wheel step-by-step from Zero when operated in a prearranged order and for operating the trip wheel, actuating connections between the trip wheel and combination wheel, a latch device for the spindle, and means actuated by the combination wheel when moveda predetermined distance from Zero to release said latch, substantially as described.

2. A permutation lock, comprising a spindle, a combination wheel on the spindle, a return wheel, means for moving the combination wheel step-by-step from zero when operated in a pre-arranged order and `tor operating the trip wheel, actuating connections between the trip wheel and combination wheel, a latch device for ythe spindle, means actuated by the combination wheel when moved a predetermined distance from zeroto release said latch, and means :for returning the permutation mechanismv by the latching means when th'elocking means is moved from lits unlatched to its latched position, substantially as described.

8. A permutation lock, comprising a com-- bination wheel, a return wheel, a friction clutch between the combination wheel and the return wheel, means for moving the combination wheel stepbystep from zero when operated in a pre-arranged order and for `operating the trip wheel, a latch device, and means actuatedy by the combination wheel when moved a predetermined distance from zero to release said latch, substantially as described. i

4E. A permutation loclr, comprising a combination wheel, a return wheel, a'friction clutch betweenl the combination wheel andk the return wheel, means for moving the combination wheel step-by-step from zero when operated in Aa pre-arranged order and for operating the trip wheel, a latch device, means actuated by the combination wheel when moved a predetermined distance from zero to release said latch, and means for returning the premutation mechanism by the locking means when the locking means is moved from its. unlocked to its lockedk position, substantially as described.'

5. An electrical switch lock comprising permutation mechanism including a combination wheel, push buttons for actuating the combination wheel, a return wheel.

actuating mechanism rbetween the return wheel and Lthe combination wheel, a latch member for the electrical switch for latchingit in its open position, and means on the combination wheel for releasing the latch when moved a predetermined distance, substantially as described. y

6. An electrical switch' lock comprising permutation mechanism including a com .bination wheel, push buttons for actuating the combination wheel, a return wheel,

actuating mechanism between the return wheel and the combination wheel, a latch member for the electrical switch for latching it in its open position, means on the combination wheel for releasing the latch 'so i soL when moved a predetermined distance, and y means on the latching means for returning the lock parts to their initial positions when the switch` is thrown from its closed to its open position, substantially as described.

lIn testimony whereof, I affix my signature.

JESSE B. HELLERL 

